US6178242B1 - Digital recording protection system - Google Patents

Digital recording protection system Download PDF

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Publication number
US6178242B1
US6178242B1 US09/014,791 US1479198A US6178242B1 US 6178242 B1 US6178242 B1 US 6178242B1 US 1479198 A US1479198 A US 1479198A US 6178242 B1 US6178242 B1 US 6178242B1
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ecm
digital data
tecm
key
scrambled digital
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Yossef Tsuria
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Synamedia Ltd
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NDS Ltd
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Assigned to NDS LIMITED reassignment NDS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEAUMARIS NETWORKS LLC, CISCO SYSTEMS INTERNATIONAL S.A.R.L., CISCO TECHNOLOGY, INC., CISCO VIDEO TECHNOLOGIES FRANCE
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4135—Peripherals receiving signals from specially adapted client devices external recorder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
    • H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management e.g. creating a master electronic programme guide from data received from the Internet and a Head-end or controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation

Definitions

  • the present invention relates to the production and recording of digital data streams, particularly scrambled digital data streams such as scrambled digital television data streams.
  • VCR Video Coding
  • VCR equipment is widely commercially available from a variety of manufacturers. Recording of digital television signals is also known.
  • a consumer digital VCR is described, for example, in the article “A Consumer Digital VCR for Digital Broadcasting” by Okamoto et al., published in IEEE Transactions on Consumer Electronics , Vol. 41, No. 3, August 1995, pp. 643-649.
  • European patent application EP 0 714 204 A2 assigned to LG Electronics, Inc., describes a method for copy protection in digital video systems.
  • the present invention seeks to provide an improved system for producing and recording digital data streams, and particularly for protecting recorded digital data streams including digital television data.
  • the prior art digital recording systems referred to above do not fully address the problem of recording a scrambled digital data stream.
  • digital data stream refers in a broad sense to any stream of digital data transmitted continuously at least during a particular period of time, and particularly includes broadcast digital data such as broadcast digital television signals.
  • scrambling in all of its forms, as used throughout the present specification and claims, refers to any method of scrambling, encoding, or encrypting data, many such methods being well-known in the art.
  • a digital VCR such as that described by Okamoto et al. records and reproduces a digital bit stream; that is, the digital VCR of Okamoto et al. records and produces whatever bits are presented thereto.
  • the digital VCR of Okamoto et al. could record and reproduce a scrambled digital data stream.
  • problems could arise in descrambling the recorded data stream such as, for example, for playing on a television.
  • scrambled television systems are typically controlled by a removable security element such as a removable smart card.
  • a removable security element such as a removable smart card.
  • operators of scrambled television systems periodically replace the removable security elements found in consumer home systems in order to change the security and scrambling behavior of the system.
  • the present invention seeks to provide apparatus and methods for recording digital data streams which, in addition to having other features, overcome the problem of unusability of recordings after a change of removable security elements.
  • a method for producing an output scrambled digital data stream from an input scrambled digital data stream including a plurality of control messages (ECMs), each ECM including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key, the input scrambled digital data stream also including a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the plurality of ECMs and being scrambled using the CW associated with the ECM, the method including replacing each of the plurality of ECMs with a corresponding transformed ECM (TECM), each corresponding TECM including coded information for generating the CW associated with the corresponding ECM and being encoded using a TECM key, thus producing the output scrambled digital data stream, wherein the ECM key is replaced with a new ECM key at an ECM key change time, and the
  • the step of replacing includes performing the following steps iteratively for each one of the plurality of ECMs: receiving the one ECM and the segment of scrambled digital data associated therewith, generating the associated CW from the one ECM using the ECM key, generating a transformed ECM (TECM) including coded information for generating the associated CW and being encoded using a TECM key, outputting the TECM, and outputting the segment of scrambled digital data associated with the ECM.
  • TECM transformed ECM
  • a method for recording, on a recording medium, a broadcast scrambled digital data stream to produce a scrambled digital recording the broadcast scrambled digital data stream including a plurality of control messages (ECMs), each ECM including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key
  • the broadcast scrambled digital data stream also including a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the plurality of ECMs and being scrambled using the CW associated with the ECM
  • the method including receiving the broadcast scrambled digital data stream, and recording on the recording medium a scrambled digital data stream including a plurality of transformed ECMs (TECMs) and the plurality of segments of digital data, wherein each of the plurality of ECMs is replaced with a corresponding TECM, each corresponding TECM including coded information for generating the
  • the recording step includes performing the following steps iteratively for each one of the plurality of ECMs in the broadcast scrambled digital data stream: generating the associated CW from the one ECM using the ECM key, generating a TECM including coded information for generating the associated CW and being encoded using a TECM key, recording the TECM on the recording medium, and recording the segment of scrambled digital data associated with the one ECM on the recording medium.
  • the recording medium includes a digital tape.
  • the recording medium includes a computer-accessible storage medium associated with a computer.
  • the broadcast scrambled digital data stream includes a television scrambled digital data stream.
  • each of the plurality of ECMs is encoded using a hashing method.
  • apparatus for recording, on a recording medium, a broadcast scrambled digital data stream to produce a recorded scrambled digital data stream, the broadcast scrambled digital data stream including a plurality of scrambling control messages (ECMs), each ECM including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key, and a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the plurality of ECMs and being scrambled using the CW associated with the ECM, the apparatus including receiving apparatus for receiving the broadcast scrambled digital data stream, and recording apparatus for recording on the recording medium a scrambled digital data stream including a plurality of transformed ECMs (TECMs) and the plurality of segments of digital data, wherein each of the plurality of ECMs is replaced with a corresponding TECM, each corresponding TECM including coded information for generating the CW
  • ECMs scrambling control messages
  • an output scrambled digital data stream from an input scrambled digital data stream including a plurality of scrambling control messages (ECMs), each ECM including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key, and a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the plurality of ECMs and being scrambled using the CW associated with the ECM
  • the apparatus including ECM replacement apparatus for replacing each of the plurality of ECMs with a corresponding transformed ECM (TECM), each corresponding TECM including coded information for generating the CW associated with the corresponding ECM and being encoded using a TECM key, wherein the ECM key is replaced with a new ECM key at an ECM key change time, and the TECM key is not replaced at the ECM key change time.
  • ECMs scrambling control messages
  • CW control word
  • TECM transformed ECM
  • the recording apparatus includes a CW extractor for generating the associated CW from each of the plurality of ECMs using the ECM key, a TECM generator for receiving the associated CW from the CW extractor and for generating a TECM including coded information for generating the associated CW and being encoded using a TECM key, and medium recording apparatus for receiving the TECM from the TECM generator and the segment of scrambled digital data from the receiving apparatus and for recording the TECM and the segment of scrambled digital data associated with the one of the plurality of ECMs on the recording medium.
  • the ECM replacement apparatus includes a CW extractor for generating the associated CW from each of the plurality of ECMs using the ECM key, and a TECM generator for receiving the associated CW from the CW extractor and for generating a TECM including coded information for generating the associated CW and encoded using a TECM key.
  • the apparatus includes a removable security device, wherein the removable security device includes the CW extractor.
  • the removable security device also includes the TECM generator.
  • the removable security device includes a smart card.
  • apparatus for transforming a scrambling control message (ECM) including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key into a transformed scrambling control message (TECM), the apparatus including ECM input apparatus for receiving the ECM, a CW extractor for generating the associated CW from the ECM using the ECM key, a TECM generator for generating a transformed ECM (TECM) including coded information for generating the associated CW and being encoded using a TECM key, and ECM output apparatus for outputting the TECM, wherein the ECM key is replaced with a new ECM key at an ECM key change time, and the TECM key is not replaced at the ECM change time.
  • ECM scrambling control message
  • CW control word
  • TECM transformed scrambling control message
  • an output scrambled digital data stream from an input scrambled digital data stream, the input scrambled digital data stream including a plurality of control messages (ECMs), each ECM including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key, the input scrambled digital data stream also including a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the plurality of ECMs and being scrambled using the CW associated with the ECM, the apparatus including scrambled digital data stream input apparatus for receiving an ECM and a segment of scrambled digital data associated therewith, ECM replacement apparatus for replacing the ECM with a transformed ECM (TECM), and scrambled digital data stream output apparatus for outputting the output scrambled digital data stream including the TECM and the segment of scrambled digital data, wherein the ECM key is replaced with a new
  • the apparatus includes ECM interface apparatus for outputting the ECM and receiving the TECM.
  • the ECM interface is adapted to receive a removable security element.
  • the removable security element includes a smart card.
  • a method for transforming a scrambling control message including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key into a transformed scrambling control message (TECM)
  • the method including receiving the ECM, generating, the associated CW from the ECM using the ECM key, generating a transformed ECM (TECM) including coded information for generating the associated CW and being encoded using a TECM key, and outputting the TECM, wherein the ECM key is replaced with a new ECM key at an ECM change time, and the TECM key is not replaced at the ECM change time.
  • a method for producing an output scrambled digital data stream from an input scrambled digital data stream including a plurality of control messages (ECMs), each ECM including coded information for generating a control word (CW) associated with the ECM and being encoded using an ECM key
  • the input scrambled digital data stream also including a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the plurality of ECMs and being, scrambled using the CW associated with the ECM
  • the method including receiving an ECM and a segment of scrambled digital data associated therewith, replacing the ECM with a transformed ECM (TECM), and outputting the output scrambled digital data stream including the TECM and the segment of scrambled digital data, wherein the ECM key is replaced with a new ECM key at an ECM key chance time, and the TECM key is not replaced at the
  • the method also includes outputting the ECM and receiving the TECM.
  • the step of outputting the ECM and receiving the TECM includes outputting the ECM to a removable security element and receiving the TECM from the removable security element.
  • removable security element includes a smart card.
  • FIG. 1 is a simplified partly pictorial, partly block-diagram illustration of a scrambled digital data stream recording and playback system, constructed and operative in accordance with a preferred embodiment of the present invention
  • FIG. 2 is a simplified block diagram illustrating the production of a recording scrambled digital data stream from a broadcast scrambled digital data stream by a portion of the apparatus of FIG. 1;
  • FIG. 3 is a simplified block diagram illustration of a portion of the apparatus of FIG. 1;
  • FIG. 4 is a simplified flowchart illustration of a preferred method of operation of the apparatus of FIG. 3;
  • FIG. 5 is a simplified flowchart illustration of a preferred implementation of step 210 of FIG. 4 .
  • FIG. 1 is a simplified partly pictorial, partly block-diagram illustration of a scrambled digital data stream (SDDS) recording and playback system, constructed and operative in accordance with a preferred embodiment of the present invention.
  • the system of FIG. 1 comprises a television set 100 .
  • the television set 100 may comprise any appropriate commercially available television set.
  • the television set 100 may comprise either an appropriate analog television set or an appropriate digital television set.
  • the system of FIG. 1 also comprises an integrated receiver-decoder (IRD) 110 .
  • the IRD 110 may be based on any appropriate commercially-available IRD operative to receive and decode a scrambled broadcast digital data stream and preferably additionally contains other hardware and/or software components, as described below.
  • the system of FIG. 1 also comprises a removable security element, such as a smart card 120 , in removable operative attachment with the IRD 110 .
  • the smart card 120 is typically suitably programmed, as is well-known in the art, to provide control words (CWs) for descrambling of a scrambled broadcast digital data stream by the IRD 110 .
  • CWs control words
  • Methods for programming and utilizing smart cards such as the smart card 120 to produce CWs are well-known in the art and are described, for example, in U.S. Pat. No. 5,282,249 to Cohen et al. and U.S. Pat. No. 5,481,609 to Cohen et al., referred to above, with suitable modifications, as are well-known in the art and described above, particularly in the MPEG-2 standard, for operating on digital rather than on analog data.
  • the system of FIG. 1 also preferably comprises a digital VCR 130 , which may comprise any suitable digital VCR such as, for example, the digital VCR described in the article “A Consumer Digital VCR for Digital Broadcasting” by Okamoto et al., referred to above. It is appreciated that any other appropriate digital recording apparatus may be used in place of the digital VCR 130 , the digital VCR 130 being shown in FIG. 1 by way of example only. For example, and without limiting the generality of the foregoing, an appropriate computer system may be used in place of the digital VCR 130 , the computer system being typically operative to record onto a computer-accessible storage medium associated therewith.
  • a digital VCR 130 may comprise any suitable digital VCR such as, for example, the digital VCR described in the article “A Consumer Digital VCR for Digital Broadcasting” by Okamoto et al., referred to above. It is appreciated that any other appropriate digital recording apparatus may be used in place of the digital VCR 130 , the digital VCR 130 being shown in FIG. 1 by way
  • the IRD 110 is preferably operatively attached to the television set 100 and the digital VCR 130 .
  • the IRD 110 may include digital-to-analog conversion apparatus (not shown), as is well known in the art, and may provide analog signals to the television set 100 , in which case the television set 100 may comprise an analog television set.
  • the IRD 110 may provide digital signals to the television set 100 , in which case the television set 100 may comprise a digital television set.
  • digital signals are preferably used between the IRD 110 and the digital VCR 130 .
  • the IRD 110 receives a scrambled digital data stream, also known herein as a SDDS, from a broadcast source.
  • the broadcast source may comprise any appropriate broadcast source such as, for example, a digital cable broadcast, a local digital television broadcast, or a digital satellite television broadcast, all of which are well-known in the art.
  • the SDDS may comprise an MPEG-2 data stream. as described in the MPEG-2 standard, referred to above. More generally, it is appreciated that the present invention is not limited to television broadcasts, but is applicable to all types of digital broadcast, including data broadcasts, so that the broadcast source may comprise any appropriate source broadcasting a SDDS in appropriate format.
  • the IRD 110 in cooperation with the smart card 120 , is preferably operative to descramble the SDDS.
  • the SDDS comprises a plurality of ECMs.
  • Each ECM is associated with, and is typically followed by, a scrambled digital data segment (SDSEG).
  • SDSEG scrambled digital data segment
  • Each ECM is typically encoded and comprises therein information, such as a seed, which can be used, typically by the smart card 120 , to generate a CW, the CW in turn being utilizable to unscramble the associated SDSEG.
  • the seed may be the input to a one-way function such as a hash function
  • the CW may be the result of performing the hash function on the seed.
  • the CW can be used, typically by the IRD 110 , as a key for descrambling the scrambled data segment associated with the ECM.
  • FIG. 2 is a simplified block diagram illustrating the production of a recording scrambled digital data stream from a broadcast scrambled digital data stream by the IRD 110 of FIG. 1 .
  • the block diagram of FIG. 2 comprises a simplified illustration of a broadcast SDDS 140 , which, as described above, typically comprises a plurality of ECMs and a plurality of associated SDSEGs, such as: an nth ECM 145 ; an nth SDSEG 150 associated with the nth ECM 145 ; and n+1th ECM 155 ; and an n+1th SDSEG 160 associated with the n+1th ECM 155 . It is appreciated that the block diagram of FIG.
  • Each ECM such as the nth ECM 145
  • ECM key which may comprise a one-way function as described above, the ECM key being known to the smart card 120 , in order to obtain the associated CW such as an nth CW 170 .
  • the nth CW 170 is then processed using another key, referred to throughout the present specification and claims as a TECM key, in order to produce an nth TECM 175 which may later be used, with the TECM key, to generate the nth CW 170 .
  • TECM key another key
  • each TECM such as, for example, the nth TECM 175
  • each TECM key is associated with a unique digital signature.
  • the digital signature is checked, and only a valid digital signature indicating that the recording SDDS 165 was produced with the apparatus of FIG. 1, typically particularly with the smart card 120 of FIG. 1, will be descrambled by the apparatus of FIG. 1 .
  • the use of such a digital signature is considered preferable in order to discourage unauthorized duplication and subsequent playback of the recording SDDS 165 using apparatus other than the apparatus of FIG. 1, particularly using a different smart card at some other location in place of the smart card 120 .
  • the TECM key may be of similar type to the ECM key such as, for example, a one-way function.
  • the TECM key is preferably permanently associated with the system of FIG. 1; particularly, the TECM key does not change even when the smart card 120 is replaced by the system operator, as described above.
  • any SDDS associated with the TECM key may still be descrambled using the apparatus of FIG. 1 even after such a replacement of the smart card 120 .
  • the TECM key may be produced in a wide variety of ways, such as, for example, the TECM key may be associated with and, typically, stored in the IRD 110 ; the smart card 120 ; a combination of the IRD 110 and the smart card 120 , such as partly in the IRD 110 and partly in the smart card 120 ; or another portion of the system of FIG. 1 (not shown). It is also appreciated that the TECM key may be personal to a particular user of the apparatus of FIG. 1, with more than one TECM key being associated with the apparatus of FIG. 1 and the appropriate TECM key being produced upon identification of a user of the apparatus of FIG. 1 by any method well known in the art, such as by provision of a personal identification number (PIN).
  • PIN personal identification number
  • a method is preferably provided for keeping the TECM key unchanged even when the smart card 120 is replaced, as described above.
  • Methods for providing an unchanging item of information are well known in prior art scrambled television systems using removable security elements. For example, and without limiting the generality of the foregoing, when the smart card 120 is replaced an operation may be carried out whereby an unchanging item of information stored only in the smart card 120 is temporarily stored in the IRD 110 and is then written to the replacement smart card (not shown) and erased from the IRD 110 .
  • Such prior art methods may be used to cause a TECM key to be unchanging even when the smart card 120 is replaced.
  • the nth SDSEG 150 may be placed in the recording SDDS 165 . It is appreciated that the present invention provides an apparatus and method for producing an appropriate recording SDDS 165 without requiring descrambling of any SDSEG such as the nth SDSEG 150 during the production of the recording SDDS 165 and without requiring a scrambling operation to produce an SDSEG to occur in the system of FIG. 1 at any time.
  • nth ECM 145 and the nth SDSEG 150 may be repeatedly or iteratively applied to other ECMs and the associated SDSEGs such as, for example, the n+1th ECM 155 , associated with an n+1th CW 177 , to produce an n+1th TECM 180 and the n+1th SDSEG 160 in the recording SDDS 165 .
  • the IRD 110 and the associated smart card 120 may perform operations similar to those performed on a broadcast SDDS, but using the TECM key rather than the ECM key.
  • FIG. 3 is a simplified block diagram illustration of a portion of the IRD 110 of FIG. 1 .
  • the portion of the IRD 110 shown in FIG. 3 is shown for providing a better understanding of the construction and operation of the present invention, with standard components well-known in the art, such as components used to receive a broadcast SDDS, not shown in FIG. 3 .
  • the components shown in FIG. 3 may be provided in hardware or in software and, if provided in software, may be provided in combination in software running on one or more general-purpose or special-purpose processors, as is well-known in the art.
  • the apparatus of FIG. 3 comprises a descrambler 185 and a control word extractor 190 .
  • the control word extractor 190 may preferably operate as described above to extract CWs from ECMs in the SDDS, as described above, and to provide the CWs to the descrambler 185 .
  • the descrambler 185 meanwhile receives SDSEGs in the SDDS, as described above, and applies each CW received from the descrambler 185 to the associated SDSEG to produce a clear signal.
  • control word extractor 190 preferably supplies the CWs to a scrambled digital data stream transformer 195 , the scrambled digital data stream transformer 195 preferably comprising a TECM generator 200 .
  • the scrambled data stream transformer 195 also receives the broadcast SDDS and operates, as described above with reference to FIGS. 1 and 2 and below with reference to FIGS. 4 and 5, to produce therefrom a recording SDDS, which is typically provided to a recorder.
  • descrambling operations to produce a clear signal may occur in the apparatus of FIG. 3 in parallel with the production of a recording SDDS. It is appreciated that, in a preferred implementation of the apparatus of FIG. 3, adequate buffering may be provided in the scrambled digital data stream transformer 195 or elsewhere in order to permit continuous production of the recording SDDS from the broadcast SDDS. Such methods of buffering are well-known in the art.
  • the apparatus of FIG. 3 may be operative to descramble a recording SDDS and provide a clear signal therefrom by providing the recording SDDS as input to the apparatus of FIG. 3 in place of the broadcast SDDS, the control word extractor being operative in such a mode to provide control words, as described above, using a TECM key rather than an ECM key.
  • FIG. 4 is a simplified flowchart illustration of a preferred method of operation of the apparatus of FIG. 3 .
  • the method of FIG. 4 preferably comprises the following steps:
  • An input SDDS is received (step 205 ).
  • Each ECM in the input SDDS is replaced with a TECM, the ECM comprising CW generating information and the TECM also comprising control word generating information for generating the same CW as the ECM (step 210 ).
  • An output SDDS is thus produced.
  • the output SDDS is then output (step 215 )
  • FIG. 5 is a simplified flowchart illustration of a preferred implementation of step 210 of FIG. 4 .
  • the method of FIG. 5 preferably comprises the following steps, which are preferably performed iteratively for each ECM in the input SDDS:
  • One ECM and an SDSEG associated with the ECM are input (step 220 ).
  • the CW associated with the ECM is generated from the ECM using an ECM key (step 225 ).
  • a TECM is generated using a TECM key, the TECM comprising information for generating the same CW as the ECM (step 230 ).
  • the TECM is output (step 235 ), and the SDSEG associated with the ECM, and thus also associated with the TECM, is also output (step 240 ).

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  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
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Cited By (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010033660A1 (en) * 2000-01-21 2001-10-25 Mitsuru Maeda Information processing apparatus and method
US20020108037A1 (en) * 1999-11-09 2002-08-08 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream
US20020114465A1 (en) * 2000-01-05 2002-08-22 Shen-Orr D. Chaim Digital content delivery system and method
US20030051149A1 (en) * 2001-09-12 2003-03-13 Arnaud Robert Data transmission method between a local server and local peripherals
US20030110382A1 (en) * 2001-12-12 2003-06-12 David Leporini Processing data
US6587561B1 (en) * 1998-03-04 2003-07-01 Nds Ltd. Key delivery in a secure broadcasting system
US20030174844A1 (en) * 1999-03-30 2003-09-18 Candelore Brant L. Method and apparatus for protecting the transfer of data
US20040065731A1 (en) * 2002-05-31 2004-04-08 Friedrich Vesterling Automated television/telephone rental system
US20040073617A1 (en) * 2000-06-19 2004-04-15 Milliken Walter Clark Hash-based systems and methods for detecting and preventing transmission of unwanted e-mail
US20040078575A1 (en) * 2002-01-29 2004-04-22 Morten Glenn A. Method and system for end to end securing of content for video on demand
US20040086127A1 (en) * 2002-11-05 2004-05-06 Candelore Brant L. Mechanism for protecting the transfer of digital content
US20040101138A1 (en) * 2001-05-22 2004-05-27 Dan Revital Secure digital content delivery system and method over a broadcast network
US20040153873A1 (en) * 2002-09-20 2004-08-05 Widevine Technologies, Inc. Method and system for real-time tamper evidence gathering for software
US20040168063A1 (en) * 2003-01-31 2004-08-26 Dan Revital Virtual smart card device, method and system
US20040184616A1 (en) * 2003-03-18 2004-09-23 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US20040199658A1 (en) * 2001-07-23 2004-10-07 Ezra Darshan System for random access to content
US20040199771A1 (en) * 2003-04-04 2004-10-07 Widevine Technologies, Inc. Method for tracing a security breach in highly distributed content
US20040213406A1 (en) * 2001-09-13 2004-10-28 Victor Halperin Hacking prevention system
US20050063541A1 (en) * 2002-11-05 2005-03-24 Candelore Brant L. Digital rights management of a digital device
US20050084110A1 (en) * 2003-10-21 2005-04-21 Palmer Thomas E. System and method for n-dimensional encryption
US20050089170A1 (en) * 2003-10-27 2005-04-28 Nds Limited System for providing keys
US20050120125A1 (en) * 2002-03-29 2005-06-02 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream to a virtual smart card client system
US20050160040A1 (en) * 2002-04-19 2005-07-21 Van Rijnsoever Bartholomeus J. Conditional access system and apparatus
US20050212504A1 (en) * 2004-03-24 2005-09-29 Dan Revital System and method for cable localization
US20050254648A1 (en) * 2002-09-27 2005-11-17 Nagravision S.A. Conditional access data decrypting system
US20060059508A1 (en) * 2002-07-11 2006-03-16 Koninklijke Philips Electronics N.V. Groenewoudseweg 1 Apparatus for providing conditional access to a stream of data
US20060069649A1 (en) * 2004-09-24 2006-03-30 Widevine Technologies, Inc. Method and system for providing secure CODECS
US20060072611A1 (en) * 2002-06-12 2006-04-06 Koninklijke Philips Electronic N.V. Conditional access apparatus and method
US7043473B1 (en) 2000-11-22 2006-05-09 Widevine Technologies, Inc. Media tracking system and method
US20060143481A1 (en) * 2003-03-18 2006-06-29 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US7106749B1 (en) 1999-11-10 2006-09-12 Nds Limited System for data stream processing
US7120252B1 (en) 2001-08-16 2006-10-10 Mcafee, Inc. System and method for automatically protecting private video content using cryptographic security for legacy systems
US7136487B1 (en) * 1999-06-25 2006-11-14 Mcafee, Inc. System and method for automatically protecting private video content using embedded cryptographic security
US7150045B2 (en) 2000-12-14 2006-12-12 Widevine Technologies, Inc. Method and apparatus for protection of electronic media
US7165175B1 (en) 2000-09-06 2007-01-16 Widevine Technologies, Inc. Apparatus, system and method for selectively encrypting different portions of data sent over a network
US20070036516A1 (en) * 2005-08-11 2007-02-15 The Directtv Group, Inc. Secure delivery of program content via a removable storage medium
US20070067643A1 (en) * 2005-09-21 2007-03-22 Widevine Technologies, Inc. System and method for software tamper detection
US20070104097A1 (en) * 2005-09-23 2007-05-10 Widevine Technologies, Inc. Transitioning to secure ip communications for encoding, encapsulating, and encrypting data
US20070118770A1 (en) * 2000-07-21 2007-05-24 Kahn Raynold M Secure storage and replay of media programs using a hard-paired receiver and storage device
US20070124602A1 (en) * 2003-06-17 2007-05-31 Stephanie Wald Multimedia storage and access protocol
US20070133795A1 (en) * 2000-07-21 2007-06-14 Kahn Raynold M Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device
CN1323554C (zh) * 2002-02-25 2007-06-27 汤姆森许可贸易公司 用于在属于第二域的网络中传送针对第一域加密的数据的处理设备和方法
US7239704B1 (en) * 1998-02-13 2007-07-03 Thomson Licensing S.A. Method and apparatus for recording of encrypted digital data
US20070160208A1 (en) * 2006-01-06 2007-07-12 Widevine Technologies, Inc. Selective and persistent application level encrytion for video provided to a client
US20070168484A1 (en) * 2005-09-23 2007-07-19 Widevine Technologies, Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US20070180231A1 (en) * 2006-01-31 2007-08-02 Widevine Technologies, Inc. Preventing entitlement management message (EMM) filter attacks
US7254236B1 (en) * 1999-10-06 2007-08-07 Thomson Licensing Method and system for handling two CA systems in a same receiver
US20070223870A1 (en) * 2006-03-23 2007-09-27 Seagate Technology Llc Single board digital video system
US20070265966A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Content delivery systems and methods to operate the same
US20070265967A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at broadcast headends in pay delivery systems
US20070265973A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to protect content in home networks
US20070266414A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast systems
US20070265968A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at content servers in pay delivery systems
US20070265978A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
US20070265970A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at receivers in pay delivery systems
US7299209B2 (en) 2001-10-18 2007-11-20 Macrovision Corporation Method, apparatus and system for securely providing material to a licensee of the material
US20080015999A1 (en) * 2005-02-04 2008-01-17 Widevine Technologies, Inc. Securely ingesting encrypted content into content servers
US7333610B2 (en) 2000-08-11 2008-02-19 Nds Ltd System and method for pre-encryption of transmitted content
US20080060044A1 (en) * 2006-09-04 2008-03-06 Chien-Chung Huang Personal video recorder having improved data access and method thereof
US7397918B2 (en) 2000-05-22 2008-07-08 Nds Limited Dynamically shifting control word
US20080212775A1 (en) * 2005-04-07 2008-09-04 Nds Limited Novel Trick Mode System
US20080250444A1 (en) * 2005-08-09 2008-10-09 Nagravision S.A. Method For Processing Conditional Access Contents By A User Unit
US20080288771A1 (en) * 2007-05-18 2008-11-20 Verimatrix, Inc. System and method for defining programmable processing steps applied when protecting the data
US7457414B1 (en) * 2000-07-21 2008-11-25 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US20080294786A1 (en) * 2007-05-21 2008-11-27 Widevine Technologies, Inc. Non-blocking of head end initiated revocation and delivery of entitlements in a non-addressable digital media network
US20090003600A1 (en) * 2007-06-29 2009-01-01 Widevine Technologies, Inc. Progressive download or streaming of digital media securely through a localized container and communication protocol proxy
US20090028331A1 (en) * 2006-05-04 2009-01-29 Nds Limited Scrambled Digital Data Item
US7530085B2 (en) 2001-01-02 2009-05-05 Nds Limited Method and system for control of broadcast content access
RU2355124C2 (ru) * 2003-05-14 2009-05-10 Награкард Са Способ контроля длительности действия полномочий в модуле защиты
US20090172196A1 (en) * 2007-12-27 2009-07-02 Daniel Edward Hogan System and Method For Protecting Content Transferred Between Devices
US20090210706A1 (en) * 2008-02-15 2009-08-20 Qualcomm Incorporated Methods and apparatus for conditional access of non real-time content in a distribution system
US20090327698A1 (en) * 1999-11-09 2009-12-31 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream with bandwidth based variation
CN100592682C (zh) * 2001-12-13 2010-02-24 索尼计算机娱乐公司 用于安全分配程序内容的方法和装置
US20100183149A1 (en) * 1999-11-09 2010-07-22 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices
EP2267626A2 (de) 2001-03-28 2010-12-29 NDS Limited Verfahren und vorrichtung zur verwaltung digitaler berechtigungen
US8332657B1 (en) * 1999-03-15 2012-12-11 Thomson Licensing Global copy protection system for digital home networks
US8554051B2 (en) 2009-01-07 2013-10-08 Cisco Technology, Inc. Data stream storage system
US8621631B2 (en) 2005-09-23 2013-12-31 Google Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US8689016B2 (en) 2005-12-02 2014-04-01 Google Inc. Tamper prevention and detection for video provided over a network to a client
US8751800B1 (en) 2011-12-12 2014-06-10 Google Inc. DRM provider interoperability
US8868464B2 (en) 2008-02-07 2014-10-21 Google Inc. Preventing unauthorized modification or skipping of viewing of advertisements within content
US9178693B2 (en) 2006-08-04 2015-11-03 The Directv Group, Inc. Distributed media-protection systems and methods to operate the same
US9225761B2 (en) 2006-08-04 2015-12-29 The Directv Group, Inc. Distributed media-aggregation systems and methods to operate the same
US9305590B2 (en) 2007-10-16 2016-04-05 Seagate Technology Llc Prevent data storage device circuitry swap
US9679602B2 (en) 2006-06-14 2017-06-13 Seagate Technology Llc Disc drive circuitry swap

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6987854B2 (en) 1997-09-25 2006-01-17 Thomson Licensing S.A. Method and apparatus for recording of encrypted digital data
US8300832B2 (en) 1998-01-08 2012-10-30 Samsung Electronics Co., Ltd. System and method for copy protection for digital signals
US7778418B1 (en) 1998-01-08 2010-08-17 Samsung Electronics Co., Ltd. System and method for copy protection for digital signals
MXPA01002170A (es) * 1998-08-31 2003-03-27 Thomson Licensing Sa Un sistema de proteccion de copia para redes caseras.
EP1004979A1 (de) * 1998-11-24 2000-05-31 CANAL+ Société Anonyme Tragbare Chipkarte
AU1811600A (en) 1998-11-25 2000-06-13 Sony Electronics Inc. A method and apparatus for accessing stored digital programs
US6363149B1 (en) * 1999-10-01 2002-03-26 Sony Corporation Method and apparatus for accessing stored digital programs
US20020044656A1 (en) * 1999-10-13 2002-04-18 Brant L. Candelore Interfacing a conditional access circuit to a digital device using input and output stream switching
WO2000059215A1 (en) * 1999-03-30 2000-10-05 Sony Electronics, Inc. Interfacing a conditional access circuit to a digital device using input and output stream switching
EP1045585A1 (de) * 1999-04-13 2000-10-18 CANAL+ Société Anonyme Verfahren und Anlage zur sicheren Übertragung digitaler Daten zwischen Vorrichtungen
BR9917288A (pt) * 1999-05-07 2002-02-19 Hector Raul Fernadez Lopez Sistema e aparelho de proteção digital
US6289455B1 (en) * 1999-09-02 2001-09-11 Crypotography Research, Inc. Method and apparatus for preventing piracy of digital content
AU7998500A (en) * 1999-10-06 2001-05-10 Thomson Licensing S.A. Method and system for handling two ca systems in a same receiver
US7356848B1 (en) 1999-10-19 2008-04-08 Thomson Licensing System and method of verifying authorization for communicating protected content
WO2001030083A1 (en) * 1999-10-19 2001-04-26 Thomson Licensing S.A. System and method of verifying authorization for communicating protected content
WO2001037562A1 (en) * 1999-11-19 2001-05-25 Scm Microsystems Gmbh Adaptive trans-scrambling mechanism for digital television multiple data transport system
FR2809915B1 (fr) * 2000-06-06 2003-01-03 Sagem Procede d'enregistrement securise dans un decodeur de television
FR2812781A1 (fr) * 2000-08-04 2002-02-08 Thomson Multimedia Sa Methode de distribution securisee de donnees numeriques representatives d'un contenu multimedia
FR2813739B1 (fr) * 2000-09-07 2003-06-06 Sagem Appareil de reception et d'enregistrement d'information et un procede associe
US6725459B2 (en) * 2001-02-09 2004-04-20 Scientific-Atlanta, Inc. Descrambling device for use in a conditional access system
FR2836609A1 (fr) * 2002-02-25 2003-08-29 Thomson Licensing Sa Procede de traitement de donnees chiffrees pour un premier domaine et recues dans un reseau appartenant a un second domaine
FR2843257B1 (fr) * 2002-08-02 2004-11-26 Viaccess Sa Procede et systeme d'acces conditionnel applique a la protection de contenu
US7020287B2 (en) * 2002-09-30 2006-03-28 Sony Corporation Method and system for key insertion for stored encrypted content
FR2850474B1 (fr) * 2003-01-28 2007-01-12 Martin Gorner Dispositif de commercialisation, transmission et lecture d'oeuvres numeriques
EP1698176A1 (de) * 2003-12-23 2006-09-06 Viaccess Verfahren und system mit bedingtem zugang, angewandt auf den schutz von inhalt
US8291236B2 (en) 2004-12-07 2012-10-16 Digital Keystone, Inc. Methods and apparatuses for secondary conditional access server
EP1703731A1 (de) * 2005-03-15 2006-09-20 Nagravision S.A. Verfahren zur Verschlüsselung von Daten mit bedingtem Zugriff
US20070294170A1 (en) * 2006-06-02 2007-12-20 Luc Vantalon Systems and methods for conditional access and digital rights management

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989245A (en) 1989-03-06 1991-01-29 General Instrument Corporation Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions
EP0461029A1 (de) 1990-06-08 1991-12-11 France Telecom Übertragungskontroll-Verfahren und Vorrichtung zur Einrichtung und Verteilung von Fernsehprogrammen mit bedingtem Zugang
EP0471373A2 (de) 1990-08-17 1992-02-19 General Instrument Corporation Of Delaware Informationsverarbeitungsgerät mit auswechselbarem Sicherheitselement
US5144664A (en) 1990-11-16 1992-09-01 General Instrument Corporation Apparatus and method for upgrading terminals to maintain a secure communication network
EP0506435A2 (de) 1991-03-29 1992-09-30 Scientific-Atlanta, Inc. Unabhängiges externes Sicherheitsmodul für einen digital-erweiterbaren Fernsehsignaldekoder
US5282249A (en) 1989-11-14 1994-01-25 Michael Cohen System for controlling access to broadcast transmissions
EP0714204A2 (de) 1994-11-26 1996-05-29 Lg Electronics Inc. Verfahren zum Schutz vor unerlaubtem Kopieren und Sehen in einem digitalen Fernsehsystem und Steuerverfahren dazu
FR2732537A1 (fr) 1995-03-31 1996-10-04 Canal Plus Sa Procede et installation d'enregistrement d'informations numeriques cryptees
US5574787A (en) 1994-07-25 1996-11-12 Ryan; John O. Apparatus and method for comprehensive copy protection for video platforms and unprotected source material
EP0750423A2 (de) 1995-06-23 1996-12-27 Irdeto B.V. Verfahren und Gerät zur Kontrolle des Betriebes eines Signaldekoders in einer Rundfunkanlage
US5852290A (en) * 1995-08-04 1998-12-22 Thomson Consumer Electronics, Inc. Smart-card based access control system with improved security
US5937067A (en) * 1996-11-12 1999-08-10 Scientific-Atlanta, Inc. Apparatus and method for local encryption control of a global transport data stream

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989245A (en) 1989-03-06 1991-01-29 General Instrument Corporation Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions
US5282249A (en) 1989-11-14 1994-01-25 Michael Cohen System for controlling access to broadcast transmissions
US5481609A (en) 1989-11-14 1996-01-02 News Data Security Products Ltd. System for controlling access to broadcast transmissions
EP0461029A1 (de) 1990-06-08 1991-12-11 France Telecom Übertragungskontroll-Verfahren und Vorrichtung zur Einrichtung und Verteilung von Fernsehprogrammen mit bedingtem Zugang
EP0471373A2 (de) 1990-08-17 1992-02-19 General Instrument Corporation Of Delaware Informationsverarbeitungsgerät mit auswechselbarem Sicherheitselement
US5144664A (en) 1990-11-16 1992-09-01 General Instrument Corporation Apparatus and method for upgrading terminals to maintain a secure communication network
EP0506435A2 (de) 1991-03-29 1992-09-30 Scientific-Atlanta, Inc. Unabhängiges externes Sicherheitsmodul für einen digital-erweiterbaren Fernsehsignaldekoder
US5574787A (en) 1994-07-25 1996-11-12 Ryan; John O. Apparatus and method for comprehensive copy protection for video platforms and unprotected source material
EP0714204A2 (de) 1994-11-26 1996-05-29 Lg Electronics Inc. Verfahren zum Schutz vor unerlaubtem Kopieren und Sehen in einem digitalen Fernsehsystem und Steuerverfahren dazu
FR2732537A1 (fr) 1995-03-31 1996-10-04 Canal Plus Sa Procede et installation d'enregistrement d'informations numeriques cryptees
EP0750423A2 (de) 1995-06-23 1996-12-27 Irdeto B.V. Verfahren und Gerät zur Kontrolle des Betriebes eines Signaldekoders in einer Rundfunkanlage
US5852290A (en) * 1995-08-04 1998-12-22 Thomson Consumer Electronics, Inc. Smart-card based access control system with improved security
US5937067A (en) * 1996-11-12 1999-08-10 Scientific-Atlanta, Inc. Apparatus and method for local encryption control of a global transport data stream

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"Examining the Implications of the Transcontrol Function", which were distributed at a seminar held by IIR, Ltd., in London, England, Jan. 29, 1997.
"Functional Model of a Conditional Access System," EBU Technical Review, No. 266, Dec. 21, 1995, pp. 64-77.
L. C. Guillou et al., "Encipherement and Conditional Access," SMPTE Journal, vol. 103, No. 6, Jun. 1, 1994, pp. 398-406.
Okamoto et al., "A Consumer Digital VCR for Digital Broadcasting", Pubished in IEEE Transactions on Consumer Electronics, vol. 41, No. 3, Aug. 1995, pp. 643-649.
The MPEG-2 Standard, ISO/IEC 13818-6, Jul. 12, 1996.

Cited By (188)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7239704B1 (en) * 1998-02-13 2007-07-03 Thomson Licensing S.A. Method and apparatus for recording of encrypted digital data
US6587561B1 (en) * 1998-03-04 2003-07-01 Nds Ltd. Key delivery in a secure broadcasting system
US8332657B1 (en) * 1999-03-15 2012-12-11 Thomson Licensing Global copy protection system for digital home networks
US7730300B2 (en) 1999-03-30 2010-06-01 Sony Corporation Method and apparatus for protecting the transfer of data
US20030174844A1 (en) * 1999-03-30 2003-09-18 Candelore Brant L. Method and apparatus for protecting the transfer of data
US7136487B1 (en) * 1999-06-25 2006-11-14 Mcafee, Inc. System and method for automatically protecting private video content using embedded cryptographic security
US7254236B1 (en) * 1999-10-06 2007-08-07 Thomson Licensing Method and system for handling two CA systems in a same receiver
US8055894B2 (en) 1999-11-09 2011-11-08 Google Inc. Process and streaming server for encrypting a data stream with bandwidth based variation
US6965993B2 (en) 1999-11-09 2005-11-15 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream
US20020108037A1 (en) * 1999-11-09 2002-08-08 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream
US8488788B2 (en) 1999-11-09 2013-07-16 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices
US20060059563A1 (en) * 1999-11-09 2006-03-16 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream
US7380117B2 (en) 1999-11-09 2008-05-27 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream
US20090327698A1 (en) * 1999-11-09 2009-12-31 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream with bandwidth based variation
US8386771B2 (en) 1999-11-09 2013-02-26 Google Inc. Process and streaming server for encrypting a data stream with bandwidth based variation
US20100183149A1 (en) * 1999-11-09 2010-07-22 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices
US7106749B1 (en) 1999-11-10 2006-09-12 Nds Limited System for data stream processing
US20090100186A1 (en) * 1999-11-10 2009-04-16 Nds Limited System for data stream processing
US7580416B2 (en) 1999-11-10 2009-08-25 Nds Limited System for data stream processing
US20020114465A1 (en) * 2000-01-05 2002-08-22 Shen-Orr D. Chaim Digital content delivery system and method
US20080205640A1 (en) * 2000-01-05 2008-08-28 Nds Limited. Digital content delivery system and method
US7099473B2 (en) * 2000-01-21 2006-08-29 Canon Kabushiki Kaisha Information processing apparatus and method
US20010033660A1 (en) * 2000-01-21 2001-10-25 Mitsuru Maeda Information processing apparatus and method
US20080240431A1 (en) * 2000-05-22 2008-10-02 Nds Limited Dynamically shifting control word
US7397918B2 (en) 2000-05-22 2008-07-08 Nds Limited Dynamically shifting control word
US7916865B2 (en) 2000-05-22 2011-03-29 Nds Limited Dynamically shifting control word
US20100205265A1 (en) * 2000-06-19 2010-08-12 Azure Networks, Llc Hash-based systems and methods for detecting and preventing transmission of unwanted e-mail
US20040073617A1 (en) * 2000-06-19 2004-04-15 Milliken Walter Clark Hash-based systems and methods for detecting and preventing transmission of unwanted e-mail
US8204945B2 (en) 2000-06-19 2012-06-19 Stragent, Llc Hash-based systems and methods for detecting and preventing transmission of unwanted e-mail
US20100205671A1 (en) * 2000-06-19 2010-08-12 Azure Networks, Llc Hash-based systems and methods for detecting and preventing transmission of polymorphic network worms and viruses
US8272060B2 (en) 2000-06-19 2012-09-18 Stragent, Llc Hash-based systems and methods for detecting and preventing transmission of polymorphic network worms and viruses
US20070118770A1 (en) * 2000-07-21 2007-05-24 Kahn Raynold M Secure storage and replay of media programs using a hard-paired receiver and storage device
US20070133795A1 (en) * 2000-07-21 2007-06-14 Kahn Raynold M Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device
US7457414B1 (en) * 2000-07-21 2008-11-25 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US20080313474A1 (en) * 2000-07-21 2008-12-18 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US7480381B2 (en) 2000-07-21 2009-01-20 The Directv Group, Inc. Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device
US7804958B2 (en) 2000-07-21 2010-09-28 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US7333610B2 (en) 2000-08-11 2008-02-19 Nds Ltd System and method for pre-encryption of transmitted content
US7376831B2 (en) 2000-09-06 2008-05-20 Widevine Technologies, Inc. Selectively encrypting different portions of data sent over a network
US7165175B1 (en) 2000-09-06 2007-01-16 Widevine Technologies, Inc. Apparatus, system and method for selectively encrypting different portions of data sent over a network
US20070101123A1 (en) * 2000-09-06 2007-05-03 Widevine Technologies, Inc. Selectively encrypting different portions of data sent over a network
US7043473B1 (en) 2000-11-22 2006-05-09 Widevine Technologies, Inc. Media tracking system and method
US20070083937A1 (en) * 2000-12-14 2007-04-12 Widevine Technologies, Inc. Method and apparatus for protection of electronic media
US7150045B2 (en) 2000-12-14 2006-12-12 Widevine Technologies, Inc. Method and apparatus for protection of electronic media
US7530085B2 (en) 2001-01-02 2009-05-05 Nds Limited Method and system for control of broadcast content access
US20090178073A1 (en) * 2001-01-02 2009-07-09 Nds Limited Method and system for control of broadcast content access
US7895614B2 (en) 2001-01-02 2011-02-22 Nds Limited Method and system for control of broadcast content access
EP2267626A2 (de) 2001-03-28 2010-12-29 NDS Limited Verfahren und vorrichtung zur verwaltung digitaler berechtigungen
US20040101138A1 (en) * 2001-05-22 2004-05-27 Dan Revital Secure digital content delivery system and method over a broadcast network
US7995603B2 (en) 2001-05-22 2011-08-09 Nds Limited Secure digital content delivery system and method over a broadcast network
US20040199658A1 (en) * 2001-07-23 2004-10-07 Ezra Darshan System for random access to content
US7756201B2 (en) 2001-07-23 2010-07-13 Nds Limited System for random access to content
US7120252B1 (en) 2001-08-16 2006-10-10 Mcafee, Inc. System and method for automatically protecting private video content using cryptographic security for legacy systems
US20030051149A1 (en) * 2001-09-12 2003-03-13 Arnaud Robert Data transmission method between a local server and local peripherals
US7496764B2 (en) * 2001-09-12 2009-02-24 Nagravision S.A. Data transmission method between a local server and local peripherals
KR100984946B1 (ko) * 2001-09-12 2010-10-01 나그라비젼 에스에이 로컬 서버와 로컬 주변 장치간 데이터 전송 방법
US20040213406A1 (en) * 2001-09-13 2004-10-28 Victor Halperin Hacking prevention system
US7436953B2 (en) 2001-09-13 2008-10-14 Nds Limited Hacking prevention system
US7299209B2 (en) 2001-10-18 2007-11-20 Macrovision Corporation Method, apparatus and system for securely providing material to a licensee of the material
US7590860B2 (en) * 2001-12-12 2009-09-15 Thomson Licensing S.A. Secure data processing apparatus
US20030110382A1 (en) * 2001-12-12 2003-06-12 David Leporini Processing data
CN100592682C (zh) * 2001-12-13 2010-02-24 索尼计算机娱乐公司 用于安全分配程序内容的方法和装置
US7328345B2 (en) 2002-01-29 2008-02-05 Widevine Technologies, Inc. Method and system for end to end securing of content for video on demand
US20040078575A1 (en) * 2002-01-29 2004-04-22 Morten Glenn A. Method and system for end to end securing of content for video on demand
US9258595B2 (en) 2002-02-25 2016-02-09 Thomson Licensing Device for processing and method for transmission of encoded data for a first domain in a network pertaining to a second domain
CN1323554C (zh) * 2002-02-25 2007-06-27 汤姆森许可贸易公司 用于在属于第二域的网络中传送针对第一域加密的数据的处理设备和方法
US20050120125A1 (en) * 2002-03-29 2005-06-02 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream to a virtual smart card client system
US7299292B2 (en) 2002-03-29 2007-11-20 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream to a virtual smart card client system
US20050160040A1 (en) * 2002-04-19 2005-07-21 Van Rijnsoever Bartholomeus J. Conditional access system and apparatus
US20040065731A1 (en) * 2002-05-31 2004-04-08 Friedrich Vesterling Automated television/telephone rental system
US20060072611A1 (en) * 2002-06-12 2006-04-06 Koninklijke Philips Electronic N.V. Conditional access apparatus and method
US20060059508A1 (en) * 2002-07-11 2006-03-16 Koninklijke Philips Electronics N.V. Groenewoudseweg 1 Apparatus for providing conditional access to a stream of data
US20040153873A1 (en) * 2002-09-20 2004-08-05 Widevine Technologies, Inc. Method and system for real-time tamper evidence gathering for software
US7594271B2 (en) 2002-09-20 2009-09-22 Widevine Technologies, Inc. Method and system for real-time tamper evidence gathering for software
US20050254648A1 (en) * 2002-09-27 2005-11-17 Nagravision S.A. Conditional access data decrypting system
US7920703B2 (en) 2002-11-05 2011-04-05 Sony Corporation Descrambler
US7711115B2 (en) 2002-11-05 2010-05-04 Sony Corporation Descrambler
US7508942B2 (en) 2002-11-05 2009-03-24 Sony Corporation Multi-process descrambler
US20090168996A1 (en) * 2002-11-05 2009-07-02 Sony Corporation Descrambler
US20050063541A1 (en) * 2002-11-05 2005-03-24 Candelore Brant L. Digital rights management of a digital device
US8572408B2 (en) * 2002-11-05 2013-10-29 Sony Corporation Digital rights management of a digital device
US7724907B2 (en) 2002-11-05 2010-05-25 Sony Corporation Mechanism for protecting the transfer of digital content
US20040088558A1 (en) * 2002-11-05 2004-05-06 Candelore Brant L. Descrambler
US20040086127A1 (en) * 2002-11-05 2004-05-06 Candelore Brant L. Mechanism for protecting the transfer of digital content
US20060198519A9 (en) * 2002-11-05 2006-09-07 Candelore Brant L Digital rights management of a digital device
US8379853B2 (en) 2002-11-05 2013-02-19 Sony Corporation Descrambler
US7379548B2 (en) 2003-01-31 2008-05-27 Nds Limited Virtual smart card device, method and system
US20040168063A1 (en) * 2003-01-31 2004-08-26 Dan Revital Virtual smart card device, method and system
US7007170B2 (en) 2003-03-18 2006-02-28 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US20040184616A1 (en) * 2003-03-18 2004-09-23 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US7640435B2 (en) 2003-03-18 2009-12-29 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US20060143481A1 (en) * 2003-03-18 2006-06-29 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US20060101287A1 (en) * 2003-03-18 2006-05-11 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US7356143B2 (en) 2003-03-18 2008-04-08 Widevine Technologies, Inc System, method, and apparatus for securely providing content viewable on a secure device
US20040199771A1 (en) * 2003-04-04 2004-10-07 Widevine Technologies, Inc. Method for tracing a security breach in highly distributed content
RU2355124C2 (ru) * 2003-05-14 2009-05-10 Награкард Са Способ контроля длительности действия полномочий в модуле защиты
US20070124602A1 (en) * 2003-06-17 2007-05-31 Stephanie Wald Multimedia storage and access protocol
US20050084110A1 (en) * 2003-10-21 2005-04-21 Palmer Thomas E. System and method for n-dimensional encryption
US20080279369A1 (en) * 2003-10-21 2008-11-13 Widevine Technologies, Inc. System and method for n-dimensional encryption
US7406174B2 (en) 2003-10-21 2008-07-29 Widevine Technologies, Inc. System and method for n-dimensional encryption
US8683218B2 (en) 2003-10-21 2014-03-25 Google Inc. System and method for N-dimensional encryption
US20060062385A1 (en) * 2003-10-27 2006-03-23 Nds Limited System for providing keys
US20050089170A1 (en) * 2003-10-27 2005-04-28 Nds Limited System for providing keys
US6980650B2 (en) 2003-10-27 2005-12-27 Nds Limited System for providing keys
WO2005041472A1 (en) 2003-10-27 2005-05-06 Nds Limited System for providing keys
US20050212504A1 (en) * 2004-03-24 2005-09-29 Dan Revital System and method for cable localization
US20060069649A1 (en) * 2004-09-24 2006-03-30 Widevine Technologies, Inc. Method and system for providing secure CODECS
US10691778B2 (en) 2004-09-24 2020-06-23 Google Llc Method and system for providing secure codecs
US9609279B2 (en) 2004-09-24 2017-03-28 Google Inc. Method and system for providing secure CODECS
US20080015999A1 (en) * 2005-02-04 2008-01-17 Widevine Technologies, Inc. Securely ingesting encrypted content into content servers
US20080212775A1 (en) * 2005-04-07 2008-09-04 Nds Limited Novel Trick Mode System
US7995904B2 (en) 2005-04-07 2011-08-09 Nds Limited Trick mode system
US20080250444A1 (en) * 2005-08-09 2008-10-09 Nagravision S.A. Method For Processing Conditional Access Contents By A User Unit
US8458739B2 (en) 2005-08-09 2013-06-04 Nagravision S.A. Method for processing conditional access contents by a user unit
US9325944B2 (en) 2005-08-11 2016-04-26 The Directv Group, Inc. Secure delivery of program content via a removable storage medium
US20070036516A1 (en) * 2005-08-11 2007-02-15 The Directtv Group, Inc. Secure delivery of program content via a removable storage medium
US20070067643A1 (en) * 2005-09-21 2007-03-22 Widevine Technologies, Inc. System and method for software tamper detection
US8621631B2 (en) 2005-09-23 2013-12-31 Google Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US8065733B2 (en) 2005-09-23 2011-11-22 Google, Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US20110032981A1 (en) * 2005-09-23 2011-02-10 Widevine Technologies, Inc. Transitioning to secure ip communications for encoding, encapsulating, and encrypting data
US20070104097A1 (en) * 2005-09-23 2007-05-10 Widevine Technologies, Inc. Transitioning to secure ip communications for encoding, encapsulating, and encrypting data
US7817608B2 (en) 2005-09-23 2010-10-19 Widevine Technologies, Inc. Transitioning to secure IP communications for encoding, encapsulating, and encrypting data
US20070168484A1 (en) * 2005-09-23 2007-07-19 Widevine Technologies, Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US8532075B2 (en) 2005-09-23 2013-09-10 Google Inc. Transitioning to secure IP communications for encoding, encapsulating, and encrypting data
US8689016B2 (en) 2005-12-02 2014-04-01 Google Inc. Tamper prevention and detection for video provided over a network to a client
US8526612B2 (en) 2006-01-06 2013-09-03 Google Inc. Selective and persistent application level encryption for video provided to a client
US20070160208A1 (en) * 2006-01-06 2007-07-12 Widevine Technologies, Inc. Selective and persistent application level encrytion for video provided to a client
US20070180231A1 (en) * 2006-01-31 2007-08-02 Widevine Technologies, Inc. Preventing entitlement management message (EMM) filter attacks
US20070223870A1 (en) * 2006-03-23 2007-09-27 Seagate Technology Llc Single board digital video system
US20090028331A1 (en) * 2006-05-04 2009-01-29 Nds Limited Scrambled Digital Data Item
US9338405B2 (en) * 2006-05-04 2016-05-10 Cisco Technology, Inc. Scrambled digital data item
US9967521B2 (en) 2006-05-15 2018-05-08 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast systems
US20070265978A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
US10977631B2 (en) 2006-05-15 2021-04-13 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
US20070265967A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at broadcast headends in pay delivery systems
US8095466B2 (en) 2006-05-15 2012-01-10 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at content servers in pay delivery systems
US8996421B2 (en) 2006-05-15 2015-03-31 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at broadcast headends in pay delivery systems
US20070265973A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to protect content in home networks
US8001565B2 (en) 2006-05-15 2011-08-16 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at receivers in pay delivery systems
US20070266414A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast systems
US8775319B2 (en) 2006-05-15 2014-07-08 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
US7992175B2 (en) 2006-05-15 2011-08-02 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast systems
US20070265966A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Content delivery systems and methods to operate the same
US20070265968A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at content servers in pay delivery systems
US20070265970A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at receivers in pay delivery systems
US9679602B2 (en) 2006-06-14 2017-06-13 Seagate Technology Llc Disc drive circuitry swap
US9225761B2 (en) 2006-08-04 2015-12-29 The Directv Group, Inc. Distributed media-aggregation systems and methods to operate the same
US9178693B2 (en) 2006-08-04 2015-11-03 The Directv Group, Inc. Distributed media-protection systems and methods to operate the same
US8855110B2 (en) 2006-09-04 2014-10-07 Mediatek Usa Inc. Personal video recorder having improved data access and method thereof
US20080060044A1 (en) * 2006-09-04 2008-03-06 Chien-Chung Huang Personal video recorder having improved data access and method thereof
US20080288771A1 (en) * 2007-05-18 2008-11-20 Verimatrix, Inc. System and method for defining programmable processing steps applied when protecting the data
US9268949B2 (en) 2007-05-18 2016-02-23 Verimatrix, Inc. System and method for defining programmable processing steps applied when protecting the data
US8478980B2 (en) 2007-05-18 2013-07-02 Verimatix, Inc. System and method for defining programmable processing steps applied when protecting the data
US20080294786A1 (en) * 2007-05-21 2008-11-27 Widevine Technologies, Inc. Non-blocking of head end initiated revocation and delivery of entitlements in a non-addressable digital media network
US8621093B2 (en) * 2007-05-21 2013-12-31 Google Inc. Non-blocking of head end initiated revocation and delivery of entitlements non-addressable digital media network
US8752194B2 (en) 2007-06-29 2014-06-10 Google Inc. Progressive download or streaming of digital media securely through a localized container and communication protocol proxy
US20090003600A1 (en) * 2007-06-29 2009-01-01 Widevine Technologies, Inc. Progressive download or streaming of digital media securely through a localized container and communication protocol proxy
US8243924B2 (en) 2007-06-29 2012-08-14 Google Inc. Progressive download or streaming of digital media securely through a localized container and communication protocol proxy
US9038147B2 (en) 2007-06-29 2015-05-19 Google Inc. Progressive download or streaming of digital media securely through a localized container and communication protocol proxy
US9305590B2 (en) 2007-10-16 2016-04-05 Seagate Technology Llc Prevent data storage device circuitry swap
US20090172196A1 (en) * 2007-12-27 2009-07-02 Daniel Edward Hogan System and Method For Protecting Content Transferred Between Devices
US8868464B2 (en) 2008-02-07 2014-10-21 Google Inc. Preventing unauthorized modification or skipping of viewing of advertisements within content
US20090210706A1 (en) * 2008-02-15 2009-08-20 Qualcomm Incorporated Methods and apparatus for conditional access of non real-time content in a distribution system
US8819843B2 (en) * 2008-02-15 2014-08-26 Qualcomm Incorporated Methods and apparatus for conditional access of non real-time content in a distribution system
US8554051B2 (en) 2009-01-07 2013-10-08 Cisco Technology, Inc. Data stream storage system
US8891765B1 (en) 2011-12-12 2014-11-18 Google Inc. Method, manufacture, and apparatus for content decryption module
US9697363B1 (en) 2011-12-12 2017-07-04 Google Inc. Reducing time to first encrypted frame in a content stream
US9311459B2 (en) 2011-12-12 2016-04-12 Google Inc. Application-driven playback of offline encrypted content with unaware DRM module
US9326012B1 (en) 2011-12-12 2016-04-26 Google Inc. Dynamically changing stream quality when user is unlikely to notice to conserve resources
US9223988B1 (en) 2011-12-12 2015-12-29 Google Inc. Extending browser functionality with dynamic on-the-fly downloading of untrusted browser components
US8984285B1 (en) 2011-12-12 2015-03-17 Google Inc. Use of generic (browser) encryption API to do key exchange (for media files and player)
US9542368B1 (en) 2011-12-12 2017-01-10 Google Inc. Method, manufacture, and apparatus for instantiating plugin from within browser
US8751800B1 (en) 2011-12-12 2014-06-10 Google Inc. DRM provider interoperability
US9183405B1 (en) 2011-12-12 2015-11-10 Google Inc. Method, manufacture, and apparatus for content protection for HTML media elements
US9686234B1 (en) 2011-12-12 2017-06-20 Google Inc. Dynamically changing stream quality of protected content based on a determined change in a platform trust
US9697366B1 (en) 2011-12-12 2017-07-04 Google Inc. Use of generic (browser) encryption API to do key exchange (for media files and player)
US9239912B1 (en) 2011-12-12 2016-01-19 Google Inc. Method, manufacture, and apparatus for content protection using authentication data
US9697185B1 (en) 2011-12-12 2017-07-04 Google Inc. Method, manufacture, and apparatus for protection of media objects from the web application environment
US9785759B1 (en) 2011-12-12 2017-10-10 Google Inc. Method, manufacture, and apparatus for configuring multiple content protection systems
US9875363B2 (en) 2011-12-12 2018-01-23 Google Llc Use of generic (browser) encryption API to do key exchange (for media files and player)
US9003558B1 (en) 2011-12-12 2015-04-07 Google Inc. Allowing degraded play of protected content using scalable codecs when key/license is not obtained
US10102648B1 (en) 2011-12-12 2018-10-16 Google Llc Browser/web apps access to secure surface
US10212460B1 (en) 2011-12-12 2019-02-19 Google Llc Method for reducing time to first frame/seek frame of protected digital content streams
US10452759B1 (en) 2011-12-12 2019-10-22 Google Llc Method and apparatus for protection of media objects including HTML
US10572633B1 (en) 2011-12-12 2020-02-25 Google Llc Method, manufacture, and apparatus for instantiating plugin from within browser
US10645430B2 (en) 2011-12-12 2020-05-05 Google Llc Reducing time to first encrypted frame in a content stream
US9129092B1 (en) 2011-12-12 2015-09-08 Google Inc. Detecting supported digital rights management configurations on a client device
US9110902B1 (en) 2011-12-12 2015-08-18 Google Inc. Application-driven playback of offline encrypted content with unaware DRM module

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Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE 26 APPLICATION NUMBERS ERRONEOUSLY RECORDED AGAINST ON THE ATTACHED LIST PREVIOUSLY RECORDED AT REEL: 048513 FRAME: 0297. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME;ASSIGNOR:NDS LIMITED;REEL/FRAME:056623/0708

Effective date: 20181108